Found this in the internet. And this stuff is pretty amazing. Should be a sympho metal version of "Lux Aeterna" song from the soundtrack album.
Unfortunately i am unable to identify album/edition which the song comes from. An Mp3 files from different sources do not contain "Album" tag. An apocalyptica discography from wikipedia does not contain this track. Also i could not find any lossless-encoded file.
This makes me doubt. Has Apocalyptica actually recorded this song? Can it be a bonus track from some rare edition? Or, maybe this was produced by another artist and labeled as Apocalyptica by mistake (yeah, this kind of mistakes happens sometimes).
UPD: The same track also can be found in Hans Zimmer playlists, but again, without any useful metadata.